now one of this country's great mysteries, what happened to jimmy hoffa? the former teamsters boss last seen 37 years ago in the parking lot of a michigan restaurant where he was expected to meet with detroit mobster and a new jersey labor leader. well, according to urban legends, the one-time union tough guy is buried somewhere from giants stadium to the florida everglades, under gm headquarters or maybe in cement in freeways from new york to detroit. well, now the seemingly and never-ending search for hoffa is taking police to the driveway of an unassuming house in roseville, michigan, just outside of detroit. today they drilled through the pavement under a shed and took a soil sample to see if any human remains are there. james berlin is the police chief. chief, what was found? >> today there was no discernible human remains in the samples we brought up. but we're going to have that tested by a forensic anthropologist at michigan state university to see if there are any evidence of human remains in the samples. >> okay. so what led you all to this drive